Quantitative description of C-60 diffusion on an insulating surface

Loske F, Lübbe J, Schütte J, Reichling M, Kühnle A (2010)
Physical Review B 82(15): 155428.

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The diffusion of C-60 molecules on large, atomically flat terraces of the CaF2(111) surface is studied under ultrahigh vacuum conditions at various substrate temperatures below room temperature. The weak molecule-substrate interaction on this insulating surface makes a direct observation of hopping events difficult. Therefore, to determine a quantitative value of the diffusion barrier, we employ the so-called onset method. This method is based on the analysis of spatial properties of islands created by nucleation of diffusing C-60 molecules, as measured by noncontact atomic force microscopy. We first determine the critical cluster size to be i* = 1 from coverage-dependent island size distributions prepared at a fixed substrate temperature. The diffusion barrier of E-d=(214 +/- 16) meV and an attempt frequency of nu(0)=1.4 X 10(12 +/- 0.6) s(-1) are then obtained by analyzing the island densities at different substrate temperatures.
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Loske F, Lübbe J, Schütte J, Reichling M, Kühnle A. Quantitative description of C-60 diffusion on an insulating surface. Physical Review B. 2010;82(15): 155428.
Loske, F., Lübbe, J., Schütte, J., Reichling, M., & Kühnle, A. (2010). Quantitative description of C-60 diffusion on an insulating surface. Physical Review B, 82(15), 155428. doi:10.1103/PhysRevB.82.155428
Loske, F., Lübbe, J., Schütte, J., Reichling, M., and Kühnle, A. (2010). Quantitative description of C-60 diffusion on an insulating surface. Physical Review B 82:155428.
Loske, F., et al., 2010. Quantitative description of C-60 diffusion on an insulating surface. Physical Review B, 82(15): 155428.
F. Loske, et al., “Quantitative description of C-60 diffusion on an insulating surface”, Physical Review B, vol. 82, 2010, : 155428.
Loske, F., Lübbe, J., Schütte, J., Reichling, M., Kühnle, A.: Quantitative description of C-60 diffusion on an insulating surface. Physical Review B. 82, : 155428 (2010).
Loske, Felix, Lübbe, Jannis, Schütte, Jens, Reichling, Michael, and Kühnle, Angelika. “Quantitative description of C-60 diffusion on an insulating surface”. Physical Review B 82.15 (2010): 155428.
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